Today's Message Index:
----------------------
1. 04:01 AM - Re: Uncoordinated flight help! (racerjerry)
2. 04:57 AM - Re: Re: Uncoordinated flight help! (John Hauck)
3. 06:03 AM - Re: Re: Uncoordinated flight help! (kinne russ)
4. 06:42 AM - Re: Re: Uncoordinated flight help! (Larry Cottrell)
5. 08:42 AM - Re: Re: Uncoordinated flight help! (Charlie England)
6. 09:47 AM - Re: Re: Uncoordinated flight help! (John Hauck)
7. 08:06 PM - C 90 disk brakes (William D Bradshaw)
Message 1
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| Subject: | Re: Uncoordinated flight help! |
You might want to identify the source of your problem before applying band-aids.
See if you can borrow a digital protractor to check the wings for mounting
at different angles, but also for wing twist along the span. Tape the protractor
to a straight furring strip (1 x 2) that will span the leading and trailing
edges of the wing and run it along the underside of the wing to see how much
variation you have. Digital protractors are accurate to one tenth of a degree
and also you can zero them at any point to make readings / comparison extremely
easy. Nothing is perfect, but corrections are much better made after you
identify the source of the problem.
I hate to say this, but if you purchase a digital protractor from a home store
that has a liberal return policy
Well, the darned things work so well that you will probably want to keep it anyway.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422498#422498
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| Subject: | Re: Uncoordinated flight help! |
--> <canterbury.adam@gmail.com>
I think I would be well suited to model a new trim tab like yours and go
from there. Thanks so much!
Adam C/Kolbers:
The latest edition of the Kolb Extra wanted to fly right wing low during
initial flight testing. Was the weirdest feeling I have ever had in an
airplane. It did not want to continue to roll right once it got into its
right wing low position. Could not wait to land and try to figure out what
was going on. Taped a trim tab on the rudder and she flew straight and
level the next flight. Which brings up a point. Duct tape works great
during the initial testing of trim tabs on aileron, elevator, and rudder,
until it is determined what size and where you place them permanently, if at
all.
Getting the Kolb trimmed out works best making no more than one change at a
time.
All MKIII's I am aware of have adverse yaw and require a rudder trim tab to
correct.
john h
mkIII
Titus, Alabama
Message 3
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| Subject: | Re: Uncoordinated flight help! |
Adam
You may have a hard-to-diagnose problem, but you've also got a lot of advice.
I would certainly take off the trim tab and all other 'fixes' and fly it to see
what the basic problem is. Then add things one at a time & fly it again
And good luck
Russ K
On Apr 27, 2014, at 2:17 PM, Adam Canterbury wrote:
>
> A lot of great information here. I think that I will take the trim tab off and
start from scratch. My problem is not a roll problem. Just yaw.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=422467#422467
>
>
>
>
>
>
>
>
>
>
Message 4
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| Subject: | Re: Uncoordinated flight help! |
Which brings up a point. Duct tape works great
during the initial testing of trim tabs on aileron, elevator, and rudder,
until it is determined what size and where you place them permanently, if at
all.
I used "cleeko's" for mine. Worked well with no sitckey residue.
Larry
On Mon, Apr 28, 2014 at 5:57 AM, John Hauck <jhauck@elmore.rr.com> wrote:
>
>
> --> <canterbury.adam@gmail.com>
>
> I think I would be well suited to model a new trim tab like yours and go
> from there. Thanks so much!
>
>
> Adam C/Kolbers:
>
> The latest edition of the Kolb Extra wanted to fly right wing low during
> initial flight testing. Was the weirdest feeling I have ever had in an
> airplane. It did not want to continue to roll right once it got into its
> right wing low position. Could not wait to land and try to figure out what
> was going on. Taped a trim tab on the rudder and she flew straight and
> level the next flight. Which brings up a point. Duct tape works great
> during the initial testing of trim tabs on aileron, elevator, and rudder,
> until it is determined what size and where you place them permanently, if
> at
> all.
>
> Getting the Kolb trimmed out works best making no more than one change at a
> time.
>
> All MKIII's I am aware of have adverse yaw and require a rudder trim tab to
> correct.
>
> john h
> mkIII
> Titus, Alabama
>
>
--
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Message 5
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| Subject: | Re: Uncoordinated flight help! |
On 4/28/2014 6:01 AM, racerjerry wrote:
>
> You might want to identify the source of your problem before applying band-aids.
See if you can borrow a digital protractor to check the wings for mounting
at different angles, but also for wing twist along the span. Tape the protractor
to a straight furring strip (1 x 2) that will span the leading and trailing
edges of the wing and run it along the underside of the wing to see how much
variation you have. Digital protractors are accurate to one tenth of a degree
and also you can zero them at any point to make readings / comparison extremely
easy. Nothing is perfect, but corrections are much better made after you
identify the source of the problem.
>
> I hate to say this, but if you purchase a digital protractor from a home store
that has a liberal return policy
> Well, the darned things work so well that you will probably want to keep it anyway.
>
> --------
> Jerry King
>
Most newer smart phones & tablets have free apps available that work
just as well as an expensive digital level. If your device re-orients
the screen as you turn it from vertical to horizontal, you can probably
get a digital level app for it. I've been using one on my iphone 4 to
check all kinds of stuff during my RV-7 build. Not quite as convenient
as a dedicated tool, but the price is right.
When you check the wings, don't forget to check the ailerons & elevators
for twist, also. On the planes I normally fly (faster homebuilts), twist
there can have almost as much effect as a big trim tab.
Charlie
Message 6
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| Subject: | Re: Uncoordinated flight help! |
Adam C/Kolbers:
Keep it simple.
If it was my airplane, I'd pull off the incorrectly attached rudder trim tab.
Flight test the Kolbra without the tab, then tape on a tab in the correct position.
Continue to adjust the tab and flight test until happy as a lark the adverse
yaw problem has flown away. ;-)
I would not concern myself with "rerigging" the airplane until I eliminated the
adverse yaw.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of Charlie England
Sent: Monday, April 28, 2014 10:44 AM
Subject: Re: Kolb-List: Re: Uncoordinated flight help!
On 4/28/2014 6:01 AM, racerjerry wrote:
>
> You might want to identify the source of your problem before applying band-aids.
See if you can borrow a digital protractor to check the wings for mounting
at different angles, but also for wing twist along the span. Tape the protractor
to a straight furring strip (1 x 2) that will span the leading and trailing
edges of the wing and run it along the underside of the wing to see how much
variation you have. Digital protractors are accurate to one tenth of a degree
and also you can zero them at any point to make readings / comparison extremely
easy. Nothing is perfect, but corrections are much better made after you
identify the source of the problem.
>
> I hate to say this, but if you purchase a digital protractor from a
> home store that has a liberal return policy Well, the darned things work so well
that you will probably want to keep it anyway.
>
> --------
> Jerry King
>
Most newer smart phones & tablets have free apps available that work just as well
as an expensive digital level. If your device re-orients the screen as you
turn it from vertical to horizontal, you can probably get a digital level app
for it. I've been using one on my iphone 4 to check all kinds of stuff during
my RV-7 build. Not quite as convenient as a dedicated tool, but the price is right.
When you check the wings, don't forget to check the ailerons & elevators for twist,
also. On the planes I normally fly (faster homebuilts), twist there can have
almost as much effect as a big trim tab.
Charlie
Message 7
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| Subject: | C 90 disk brakes |
Anybody using Tracy O'Brien's C 90 disk brakes on a firestar. Would
appreciate a review of these brakes and the master cylinders used.
Danny Bradshaw
McBee, SC
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